Butter package



Feb. 14, 1950 c. G. BENNETT BUTTER PACKAGE Fild Nov. 12, 1947 'Elig IF1E Il ll JF IL :L

IN VEN TOR.

ATTo/NEY Patented Feb. 1 4, 1950 BUTTER PACKAGE Clarence G. Bennett, SanMateo, Calif., assignor toPatei-son Pacific Parchment Company, acorporation of California Appncaaon November 12, 1947, semi No. 785,493z claims. (CL 99-179) terials together with a chemical'or physical agentactive through one of the outer layers. Y

Another object is to provide a new laminated sheet material having acommunity of physical and chemical characteristics not obtained in anysuch material now available.

Other and more specific objects will appear as the description proceeds.

The broad aspects of the invention will best be understood byconsideration of the numerous embodiments or specific examples disclosedhereinafter. Y

In the drawings Figure 1 is a cross-section of a laminated materialinaccordance with the present invention.

Figure 2 is a cross-section of a similar laminate involving differentcomponent parts.

Figure 3 shows in section a modification of one of the outer layers ofthe laminate.

Figure 4 is a plan of the structure shown in Figure 3 with the layers ofthe laminate successively broken away in order more clearly toillustrate the invention.

Figure 1 is a general representation of a laminated sheet structurehaving the general characteristics referred to in the followingdescription of specific embodiments of this invention. 'I'hat is thelayer III is a permeable sheet material, for example, vegetableparchment paper. Layer Il may be of cellophane and in the instance shownin Figure 1 may have the common coatings I3 and Il, as of waterproofingmaterials, or heatsealing lacquer and the like. The center layer I2 maybe an adhesive material or may be of porous or absorbent materialcontaining an active material, which may also constitute a layer I5 onone side of the center layer. The active material may be either liquidor solid. This sheet, generically considered, may be utilized in manyfields, as will appear.

In the creamery industry, for many years much effort has been put forthto eliminate the loss of weight of butter due to evaporation of watertherefrom during cold storage in warehouses; also xn-uch effort has gonetoward preventing the growthof moldupon the surface of the butter, whichis commonly wrapped in vegetable parchment paper. One solution of thislatter problem has been found in the treatment of the parchment paperwrappers or container liners with mold inhibiting chemicals, forexample, sodium or calcium propionate. Sodium chloride is also used.This isv commonly used by dipping the parchment paper just prior to usein a strong solution of the propionate and thereafter, while the paperis still moist, wrapping the butter, or lining the container and iillingit with butter. For the purpose of reducing moisture loss infoodproducts of many natures, impermeable materials such as waterproofregenerated cellulose have been utilized.

In the embodiment of my invention which I have successfully utilized inthe solution of both the above mentioned problems, layer Il of thelaminate shown in Figure 1 is a heat sealing coated moisture-proofedcellophane. The layer I0 is a vegetable parchment paper and the layer I2is a paraillne wax laminating or adhesive agent. Numeral I5 thenindicates a layer -or coating of sodium or calcium propionate. It is tobe understood that the relative thicknesses of the layers are not trueand that Figure 1 is exaggerated. The propionate layer I5 is not of suchthickness as to prevent the parchment paper from being prevent moldgrowth thereupon. The moisture will not, however, penetrate the waxlayer and/or the cellophane layer, and reduction in weight occasioned bysuch moisture loss will be avoided.

One of several methods may be used in the preparation of the laminateshown in Figure l. In one method the central layer I2 may be parchmentpaper which will be dipped into perhaps a 20% solution of sodiumpropionate and thereafter be dried and secured to the outer layers. Inanother method, a wax layer I2 may, while warm enough to be adherent, bedusted with sodium chloride, powdered sodium or calcium propionate andthereafter the parchment paper layer secured. Or, the layer Ill may becoated and thereafter secured to the cellophane layer II.

The same type of sheet may be used as con- 8 tainer liner, or as aportion or complete bag or container, as for butter, shortening, lard,Ice cream, margarine, bread and pastry mixes, dessert powders. etc.

Another modincation of the invention may be used in the art ofpreserving foods or other products which contain fats or oils andundergo oxidative deterioration or become rancid. An antioxygen oranti-rancidity agent obtained from oat flour and other cereal fiours,and known on the market under several trade names, is widely used forthis purpose. Suitable materials are disclosed in U. S. Patents2,036,697, 2,029,248, 2,049,017 and 2,038,752. In a laminated wrapper orbag for purpose of 'preserving foods from rancidity or oxidation, thelayer I might be of parchment paper as before, while the coating orother layer I may be of the antioxidative material. For materials notintended for human consumption, other agents, such as hydroquinone,furfural. etc., may be used. As applied to butter, I5 may inc lude bothanti-mold and anti-oxidant agents.

In Figures 3 and 4 is shown a modified form of the laminated structurein which one of the layers has been structurally changed so as toaccommodate a greater amount of active agent under the porous layer. Inthis instance, the layer II is cellophane, the laminating agent I2 isthe wax and the outer layer I0 is of paper permeable to air. The upperlayer I0, however, has been, as for example by means of relieved orintaglio press rolls, secured to the layer I2 only at spaced lines I6,leaving pockets I1 to accommodate a considerably increased portion ofthe material I5. Other patterns than the rectangular, as spot or" line,may be used. A specic use for this particular laminate is in garmentbags. Material I5 may be powdered naphthalene, paradichlorobenzene orother volatile insecticide or repellent. With the garment bag made up sothat the layer Il) is on the inside, sublimation of the active agent I5will be restricted to the inside of the bag where it may perform itsfunction, and the material is not wasted by being diffused into theouter atmosphere.

Garment bags made of the laminate shown in Figures 3 and 4 are extremelyeffective for the purpose, protecting the garments enclosed within frommoisture and other outside inuences and inhibiting the activities or,depending upon the nature of the material I5, actually destroying mothsor their larva. The layer of porous paper I5 prevents actual contact ofthe garments with the treating agent and controls the rate ofevaporation or sublimation of the material. The sheet may be used aschest liners, and might incorporate cedar oil in the center layer, forits fragrance or supposed repellent effect.

The structure shown in Figures 3 and 4 is also particularly useful incase the material I5 is of a water absorbent or adsorbent nature, forexample, silica jel, activated alumina, etc. Such a laminate is usefulfor the wrapping of machine parts, for example, which are subject torust in case the moisture content of the air surrounding them reaches acertain rather low figure. The moisture-proof cellophane layer, being onthe outside. prevents the penetration of moisture from the outside,while the moisture contained in the package as formed is quickly removedfrom the air by the desiccant I5.

Figure 2 shows a less desirable, but still useful. embodiment of theinvention in which the active agent I5, instead of merely being coatedupon either the wax layer I2 or the inner surface of from the wax is anadvantage.

the outer porous layer Il, is contained within the wax layer I2. Thismay be less desirable than the embodiment indicated in Figure 1 in someapplications where the moisture-prooi quality of the layer I2 isparticularly desired, but may be of even more advantage than that shownin Figure 1 where the slow release o! the material Il The adhesive may,for example, be one in which the chemical popularly calleddichlorodiphenyltrichloroethane may be dissolved or suspended, and thelaminate used to line enclosed spaces for insecticidal purposes.

Many changes are possible. The layer Il, for example, may be of otherimpermeable materials, such as tinfoil, aluminum foil, wax paper,moisture-proof resin or plastic sheet material, or other materialshaving the desired qualities as to being impermeable to water. grease,air, etc. The laminating agent I2 may be of any of those used in thisart and not incompatible with the material I5 which it is desired to usein any speciiie application. The layer III is usually of some porous,absorbent, permeable material such as paper, un-

. waterproofed cellophane and other permeable sheet materials. In casethe material I5 is of a nature to diffuse into the air, the layer I0should be air permeable. If it is desired that the material I5 bedissolved in water passing through the layer I0, then layer III shouldbe sufficiently permeable to water to allow such action.

The central layer I2 may be porous paper or the like impregnated orcoated with the active agent. For example, a laminate including acentral layer impregnated with glycerol will be of value in retainingmoisture in a substance wrapped therein. The central or an outer layermay be decorated, or one of the layers may be printed with indicia ofquantity for lling or using, visible from the outside of the container.

The layers may be secured throughout their contacting surfaces, or atpoints, or in case of small sheets, only at edges.

One or more of the layers may be colored for such purpose as stoppinglight of certain wavelength, etc. The center layerv may include powderedaluminum for its decorative or heat conducting effect, or asbestosfibers for insulation purposes. Any paper or especially treated paper iscontemplated for use. One of the contemplated uses is in a bag or othercontainer for the packaging of asphaltic materials including tar,asphalt cements, roofing asphalts, etc.

I claim:

l. A butter package comprising a cake of fresh butter completelyenclosed in a sheet material comprising a relatively water and moistureimpermeable base sheet material positioned on the outside of thepackage, a relatively water permeable sheet of vegetable parchmentpositioned in direct contact with the cake of butter, a layer of watersoluble mold-retarding material selected from the group consisting ofsodium chloride, sodium propionate, calcium propionate, and mixturesthereof, provided between said sheets, and a laminating agent securingsaid sheets together as a unitary wrapper with said mold-retardingmaterial therebetween.

2. A butter package comprising a cake of fresh butter completelyenclosed in a sheet material consisting of a relatively water andmoisture impermeable base sheet material positioned on the outside ofthe package, a relatively water permeable sheet of vegetable parchmentpositioned in direct contact with the cake oi butter,

zumos a. layer o! niet soluble moid-retardinz material selected tom thegroup oonsistins of sodium chloride. sodium propionate. calcium Dmlmmte'and mixtures thereof. provided between said 3240'072 sheets, and slaminating agent securing said s` 34329908 sheets together as a unitaryWrapper Wim 1d 2'415'38'1 v mdd-mini mtelil therebetween. 2,437,647CLARENCE G. BENNETT. 3.441.417

summons orrnn ie The following references ure o! .record in the Numberme o: aus ment: 49

Q' UNrrnD sTATm PATENTS Name Date Masher June 18, 1940 Hodgdon 'et al.Apr. 29, 1941 Johnson Sept. 21, 1943 Graebner et al. Feb. 4, 1947Vahlteich Sept. 16. 1947 Farrell May 11, 1948 FOREIGN PA'I'ENTS CountryDate Great Britain Aug. 12, 1938

2. A BUTTER PACKAGE COMPRISING A CAKE OF FRESH BUTTER COMPLETELYENCLOSED IN A SHEET MATERIAL CONSISTING OF A RELATIVELY WATER ANDMOISTURE IMPERMEABLE BASE SHEET MATERIAL POSITIONED ON THE OUTSIDE OFTHE PACKAGE, A RELATIVELY WATER PERMEABLE SHEET OF VEGETABLE PARCHMENTPOSITIONED IN DIRECT CONTACT WITH THE CAKE OF BUTTER, A LAYER OF WATERSOLUBLE MOLD-RETARDING MATERIAL SELECTED FROM THE GROUP CONSISTING OFSODIUM CHLORIDE, SODIUM PROPIONATE, CALCIUM PROPIONATE, AND MIXTURESTHEREOF, PROVIDED BETWEEN SAID SHEETS, AND A LAMINATING AGENT SECURINGSAID SHEETS TOGETHER AS A UNITARY WRAPPER WITH SAID MOLD-RETARDINGMATERIAL THEREBETWEEN.